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    LX-1031, A Tryptophan 5-hydroxylase Inhibitor That Reduces 5-HT Levels For The Potential Treatment O

    it is an under development drug but sounds interesting and i think it is not available on the market yet .it reduces serotonin formation in digestive system and it doesnt cross blood–brain barrier. http://www.ncbi.nlm.nih.gov/pubmed/21154152 LX-1031, being developed by Lexicon Pharmaceuticals...